the address was part of the national homeless and low income voter registration week. >>> the candidate's words were being dissected in realtime. >> reporter: last night's political debate between challenger mitt romney and president barack obama may have gardeners high ratings on tv but it also the received top tweets. they told me the debate was the most tweeted political event ever and there were notable spikes during the debate. this minute by minute chart shows when activity rose or fell. one moment was when moderator jim lehrere declined to take the debate to another topic. analysts say the ability for people to comment on everything from the moderator to who they think is winning is a game changer. during the evident, several accounts sprung up especially after this comment about pbs funding. >> i like big bird, i like you too but i'm not going to keep borrowing money from china to pay for it. >> reporter: appliance maker kitchen aid usa twitter page sent out this tweet after president obama told a story about his late grandmother. quote obama's grandma everyone knew it was going t